2023 MERCEDES-BENZ C CLASS Owners Manual

service interval reset maintenance schedule pairing phone towing AUX alarm

Page 49 of 490

MERCEDES-BENZ C CLASS 2023 Owners Manual �P�R�E�-�S�A�F�E�n
� �s�y�s�t�e�m
�F�u�n�c�t�i�o�n� �o�f� �P�R�E�-�S�A�F�E �n
� �(�a�n�t�i�c�i�p�a�t�o�r�y� �o�c�c�u�p�a�n�t
�p�r�o�t�e�c�t�i�o�n�)
�P�R�E�-�S�A�F�E �n
� �i�s� �a�b�l�e� �t�o� �d�e�t�e

PRE-SAFEn
system
Function of PRE-SAFE n
(anticipatory occupant
protection)
PRE-SAFE n
is able to detect certain critical driv-
ing situations and implement pre-emptive meas-
ures to protect the vehicle occupants.
PRE-SAFE n
can implement the following meas-
ures independently of each other:
= Tightening the seat belts on the driver\bs seat
and front passenger seat.
= Closing the side windows.
= Vehicles with sliding sunroof: closing the slid-
ing sunroof.
= Vehicles with memory function: moving the
front passenger seat to a more favorable seat
position.
= PRE-SAFE n
Sound: provided that the multime-
dia system is switched on, generating a brief
noise signal to stimulate the innate protective mechanism of a person\bs hearing.
*NOTE Damage caused by objects in the
footwell or behind the seat
The automatic adjustment of the seat position
may result in damage to the seat and/or the object.
Stow objects in a suitable place.
Backing up the PRE-SAFE n
system measures
If an accident did not occur, the pre-emptive
measures that were taken are reversed.
You will need to perform certain settings yourself.
If the seat belt pre-tensioning is not reduced,
move the seat backrest back slightly.
The locking mechanism releases.
Function of PRE-SAFE n
PLUS (anticipatory occu-
pant protection plus)
PRE-SAFE n
PLUS can detect certain impacts, par-
ticularly an imminent rear impact, and take pre-
emptive measures to protect the vehicle occu-
pants. These measures cannot necessarily pre-
vent an imminent impact.
PRE-SAFE n
PLUS can implement the following
measures independently of each other:
= Tightening the seat belts on the driver\bs seat
and front passenger seat.
= Increasing brake pressure when the vehicle is
stationary. This brake application is canceled
automatically when the vehicle pulls away.
If an accident did not occur, the pre-emptive
measures that were taken are reversed.
System limits
The system will not initiate any action in the fol- lowing situations:
= when backing up
The system will not initiate any braking application
in the following situations:
= whilst driving
or
= when entering or exiting a parking space while
using Active Parking AssistOccupant safety47

Page 50 of 490

MERCEDES-BENZ C CLASS 2023 Owners Manual �F�u�n�c�t�i�o�n� �o�f� �P�R�E�-�S�A�F�E�n
� �I�m�p�u�l�s�e� �S�i�d�e
�I�f� �a�n� �i�m�m�i�n�e�n�t� �s�i�d�e� �i�m�p�a�c�t� �i�s� �d�e�t�e�c�t�e�d�,� �P�R�E�-
�S�A�F�E �n
� �I�m�p�u�l�s�e� �S�i�d�e� �

Function of PRE-SAFEn
Impulse Side
If an imminent side impact is detected, PRE-
SAFE n
Impulse Side can pre-emptively move the
upper body of the vehicle occupant in the front seat towards the center of the vehicle. It does thisby rapidly inOating an air cushion in the outer seat
side bolster of the seat backrest on the side on which the impact is anticipated. This increases
the distance between the door and the vehicle
occupant.
If PRE-SAFE n
Impulse Side has been deployed or
is faulty, the PRE-SAFE Pulse Side Inoperative
See Operator's Manual display message appears
( page 383).
Automatic measures aser an accident
Depending on the type and severity of the acci- dent, and depending on the vehicle\bs equipment,the following measures can be implemented, forexample:
= Automatic braking (post-collision brake)
= Activating the hazard warning light system
=Triggering an automatic emergency call
( page 291)
= Switching oM the engine
To start the vehicle again, switch the vehicle
oM and on once more ( page 150). Depend-
ing on the type and severity of the accident,
you may no longer be able to start the vehicle.
= Switching oM the fuel supply system
= Unlocking the vehicle doors
= Lowering the side windows
= Displaying the emergency guide in the central
display
= Switching on the interior lighting
Function of the post-collision brake
Depending on the accident situation, the post-col-
lision brake can minimize the severity of a further
collision or even avoid it.
If an accident is detected, the post-collision brake can implement automatic braking. When the vehi- cle has come to a standstill, the electric parking
brake is automatically applied.The driver can cancel automatic braking by taking
the following actions:
= Braking more strongly than automatic braking
= Fully depressing the accelerator pedal with
force
Safely transporting children in the vehicle
Always observe when children are traveling in the vehicle
\bAlso strictly observe the safety notes for the
speciNc situation. In this way, you can recog-
nize potential risks and avoid dangers if chil- dren are traveling in the vehicle
( page 49).
Be diligent
Bear in mind that negligence when securing a
child in the child restraint system may have seri-
ous consequences. Always be diligent in securing
a child carefully before every journey.
Never allow babies and children to travel sitting
on the lap of another vehicle occupant.
48Occupant safety

Page 51 of 490

MERCEDES-BENZ C CLASS 2023 Owners Manual �T�o� �i�m�p�r�o�v�e� �p�r�o�t�e�c�t�i�o�n� �f�o�r� �c�h�i�l�d�r�e�n� �y�o�u�n�g�e�r� �t�h�a�n�1�2� �y�e�a�r�s� �o�l�d� �o�r� �u�n�d�e�r� �5� s� �(�1�.�5�0� �m�)� �i�n� �h�e�i�g�h�t�,
�M�e�r�c�e�d�e

To improve protection for children younger than12 years old or under 5 s (1.50 m) in height,
Mercedes-Benz recommends you observe the fol- lowing information:
= Always secure the child in a child restraint sys-
tem suitable for this Mercedes-Benz vehicle.
= The child restraint system must be appropriate
to the age, weight and size of the child.
= The vehicle seat must be suitable for Ntting a
child restraint system.
Accident statistics show that children secured on
the rear passenger compartment seats are gener- ally safer than children secured on the front seats.
For this reason, Mercedes-Benz strongly advises
that you Nt a child restraint system to a rear
passenger compartment seat.
The generic term child restraint system The generic term child restraint system is used in this Operator\bs Manual. A child restraint systemis, for example:
= a baby car seat
= a rearward-facing child seat=a forward-facing child seat
= a child booster seat with a backrest and seat
belt guide
Mercedes-Benz recommends using a child
booster seat with a backrest.
The child restraint system must be appropriate to
the age, weight and size of the child.
Observe laws and legal requirements
Always observe the legal requirements when
using a child restraint system in the vehicle.
Observe standards for child restraint systemsAll child restraint systems must meet the followingstandards:
= U.S. Federal Motor Vehicle Safety Standards
213 and 225
= Canadian Motor Vehicle Safety Standards 213
and 210.2
ConNrmation that the child restraint system com-
plies with the standards can be found on an instruction label on the child restraint system. This conNrmation can also be found in the instal-lation instructions that are included with the child
restraint system.
Detecting risks, avoiding danger
Securing systems for child restraint systems in the vehicle
Only use the following securing systems for child restraint systems:
= the ISOFIX mounting brackets
= the vehicle\bs seat belt system
= the Top Tether anchorages
Installing an ISOFIX child restraint system is pre- ferred.
Simply attaching to the securing rings on the vehi- cle can reduce the risk of installing the child
restraint system incorrectly.
When securing a child with the integrated seat
belt of the ISOFIX child restraint system, always comply with the permissible gross weight for thechild and child restraint system ( page 54).
A child booster seat may be necessary to achieve
proper seat belt positioning for children over
Occupant safety49

Page 52 of 490

MERCEDES-BENZ C CLASS 2023 Owners Manual �4�0� �l�b�s� �(�1�8� �k�g�)� �i�n� �w�e�i�g�h�t� �o�r� �u�n�t�i�l� �t�h�e�y� �r�e�a�c�h� �a
�h�e�i�g�h�t� �w�h�e�r�e� �a� �t�h�r�e�e�-�p�o�i�n�t� �s�e�a�t� �b�e�l�t� �c�a�n� �b�e� �i�n�s�t�a�l�-
�l�e

40 lbs (18 kg) in weight or until they reach a
height where a three-point seat belt can be instal-
led properly without a child booster seat.
Mercedes-Benz recommends a suitable child
booster seat with a backrest and seat belt guide.
Advantage of a rearward-facing child restraint sys-
tem
It is preferable to transport a baby or a small child
in a suitable rearward-facing child restraint sys- tem. In this case, the child sits in the oppositedirection to the direction of travel and faces back-wards.
Babies and small children have comparatively
weak neck muscles in relation to the size and weight of their head. The risk of injury to the cer-vical spine during an accident can be reduced in a
rearward-facing child restraint system.Always secure a child restraint system correctly&WARNING Risk of injury or death due to
incorrect installation of the child restraint
system
The child can then not be protected or restrained as intended.
Be sure to comply with the manufactur-
er\bs installation instructions for the child
restraint system and its correct use.Make sure that the entire base of the child restraint system always rests on
the sitting surface of the seat.Never place objects (e.g. cushions)
under or behind the child restraint sys- tem.Use child restraint systems only with the
original cover designed for them.Always replace damaged covers with
genuine covers.&WARNING Risk of injury or death due to
unsecured child restraint systems in the
vehicle
If the child restraint system is incorrectly
mounted or unsecured, it may come loose.
The child can then not be protected or
restrained as intended.
Unused child restraint systems could be Oung
around and hit vehicle occupants.
Always comply with the manufacturer\bs
installation instructions for the child
restraint system and its correct use.Always Nt child restraint systems cor-
rectly, even if they are transported in the vehicle unused.
= Always observe the child restraint system
manufacturer\bs installation and operating
instructions as well as the vehicle-speciNc
information:
- Installing the ISOFIX child restraint system
on the right and les rear seats
( page 54).
50Occupant safety

Page 53 of 490

MERCEDES-BENZ C CLASS 2023 Owners Manual �-�S�e�c�u�r�i�n�g� �t�h�e� �c�h�i�l�d� �r�e�s�t�r�a�i�n�t� �s�y�s�t�e�m� �w�i�t�h
�t�h�e� �s�e�a�t� �b�e�l�t� �o�n� �t�h�e� �r�e�a�r� �s�e�a�t
�( � � �p�a�g�e� �5�7�)�.
�- �S�e�c�u�r�i�n�g� �t�h�e�

-Securing the child restraint system with
the seat belt on the rear seat
( page 57).
- Securing the child restraint system with
the seat belt on the front passenger seat
( page 59). Observe the speciNc
instructions for the rearward-facing and
forward-facing child restraint systems ( page 58).
If the front passenger seat is occupied,
ensure, both before and during the jour- ney, that the status of the front passengerair bag is correct for the current situation
( page 44).
= Observe the warning labels in the vehicle inte-
rior and on the child restraint system.
= Also secure Top Tether if present.Do not modify the child restraint system&WARNING Risk of injury due to modiNca-
tions to the child restraint system
The child restraint system can no longer func-
tion properly. This poses an increased risk of
injury.
Never modify a child restraint system.Only aPx accessories which have been
specially approved for this child restraint
system by the child restraint system\bs manufacturer.
Only use child restraint systems which are in
proper working condition
&WARNING Risk of injury or death caused
by the use of damaged child restraint sys- tems
Child restraint systems or their retaining sys-
tems that have been subjected to stress in an
accident may not be able to perform their
intended protective function.
It may be the case that the child cannot be
properly restrained.Always immediately replace child restraint systems that have been dam-
aged or involved in an accident.Have the securing systems for the child restraint systems checked at a qualiNed
specialist workshop before installing a
child restraint system again.
Avoid direct sunlight
&WARNING Risk of burns when the child
seat is exposed to direct sunlight
If the child restraint system is exposed to
direct sunlight or heat, parts could heat up
excessively.
Children could suMer burns from these parts,
particularly the metallic parts of the child
restraint system.
Always make sure that the child restraint
system is not exposed to direct sunlight.Occupant safety51

Page 54 of 490

MERCEDES-BENZ C CLASS 2023 Owners Manual ��C�o�v�e�r� �t�h�e� �c�h�i�l�d� �r�e�s�t�r�a�i�n�t� �s�y�s�t�e�m� �w�i�t�h� �a�b�l�a�n�k�e�t�,� �f�o�r� �e�x�a�m�p�l�e�.��I�f� �t�h�e� �c�h�i�l�d� �r�e�s�t�r�a�i�n�t� �s�y�s�t�e�m� �h�a�s� �b�e�e�n

Page 55 of 490

MERCEDES-BENZ C CLASS 2023 Owners Manual �C�e�n�t�e�r� �r�e�a�r� �s�e�a�t
�S�e�c�u�r�i�n�g� �s�y�s�t�e�m�:�v�V�e�h�i�c�l�e� �s�e�a�t� �b�e�l�t�¯�A�l�s�o� �s�e�c�u�r�e� �T�o�p� �T�e�t�h�e�r� �i�f� �p�r�e�s�e�n�t
�( � � �p�a�g�e� �5�5�)�.
�A

Page 56 of 490

MERCEDES-BENZ C CLASS 2023 Owners Manual �I�n�s�t�a�l�l�i�n�g� �a� �L�A�T�C�H�-�t�y�p�e� �(�I�S�O�F�I�X�)� �c�h�i�l�d� �r�e�s�t�r�a�i�n�t
�s�y�s�t�e�m� �o�n� �t�h�e� �l�es� �a�n�d� �r�i�g�h�t� �r�e�a�r� �s�e�a�t�s
q�I�n�s�t�a�l�l�i�n�g� �

Installing a LATCH-type (ISOFIX) child restraint
system on the les and right rear seats
qInstalling an ISOFIX child restraint system on
the les and right rear seats
&WARNING Risk of accident if the rear
bench seat, rear seat and seat backrest
are not engaged
The rear bench seat, rear seat and seat back-
rest may fold forwards, even when you are
driving.
= As a result, the vehicle occupant will be
pushed into the seat belt with increased
force. The seat belt will not be able to pro-
tect as intended and could cause addi-
tional injury.
= Objects or loads in the trunk or cargo
compartment will not be restrained by the
seat backrest.
Make sure that the rear bench seat, the rear seat and the seat backrest are engaged before every trip.If the rear seat backrest is not engaged and
locked in place, the red lock veriNcation indicator
will be visible.&WARNING Risk of injury or death if the
permissible gross mass of the child and
child restraint system together is excee-
ded.
Too much load may be placed on the LATCH- type (ISOFIX) or iSize child restraint systemsand the child may not be restrained correctly
in the event of an accident, for example.
If the child is secured in a LATCH-type
(ISOFIX) child restraint system with inte-
grated seat belt, the total mass of the
child and child restraint system must not
exceed 73 lb (33 kg).Always comply with the information about the
mass of the child:
= in the manufacturer\bs installation and operat-
ing instructions for the child restraint system used= on a label on the child restraint system, if
present
Regularly check that the permissible gross mass
of the child and child restraint system is still com- plied with.
When installing a child restraint system, observe the following:sAlways observe the correct use of the seatsand consider their suitability for attaching a
child restraint system.sAlways comply with the manufacturer\bs
installation and operating instructions for the
child restraint system used.sMake sure that the child\bs feet do not touch
the front seat. If necessary, move the front
seat slightly forwards.
® When installing an ISOFIX child restraint
system, also observe the following:
sWhen using a baby car seat in weight group
0/0\f and a rearward-facing child restraint
system in weight group 1 on a rear seat:
adjust the front seat so that the seat does
not touch the child restraint system.54Occupant safety

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